"Progress bar" used space in IredAdmin

Hello,

I'm gonna make a new mail server from old iRedMail to new iRedMail.
I have to copy folders from old mail server to new mail server.
I have done a test using a fake user, and I see that the "progress bar" in iRedAdmin showing used space for a user isn't "up to date".

Is there a way to update this progress bar by "rescanning" the user folder ?

Thnaks

Nicolas